\begin{table}%t9
\caption{$\it UBV$ photometry and properties of the studied stars.}
\label{table UBV photometry}
%\centering
\small
\begin{tabular}{lrrrlrrccl}
\hline
\hline
Star & 
$V$~~~~~~~~~~~&
$U-V$~~~~~~ &  
$B-V$~~~~~~ &
Sp &
$M_V$ &
$(B-V)_0$ &
$E(B-V)$ & 
$D$ (kpc) &
$Q({\rm H}^0)$ (s$^{-1}$) \\ 
\hline
1 & 10.385 $\pm$ 0.008 &    1.377 $\pm$ 0.024 & 1.553 $\pm$ 0.017 & K1 III &    0.61 &    1.07~~~ & 0.48 & 0.45 &       \\
2 & 13.055 $\pm$ 0.015 & $-$0.104 $\pm$ 0.036 & 0.934 $\pm$ 0.029 & O5 V   & $-$5.33 & $-$0.33~~~ & 1.26 & 7.82 & 49.48 \\
3 & 13.607 $\pm$ 0.012 & $-$0.237 $\pm$ 0.036 & 1.038 $\pm$ 0.026 & O6.5 V & $-$4.99 & $-$0.32~~~ & 1.36 & 7.54 & 49.17 \\
4 & 13.910 $\pm$ 0.034 & $-$0.099 $\pm$ 0.084 & 1.028 $\pm$ 0.072 & O8 V   & $-$4.66 & $-$0.32~~~ & 1.35 & 7.56 & 48.80 \\
5 & 13.748 $\pm$ 0.004 & $-$0.184 $\pm$ 0.019 & 0.958 $\pm$ 0.008 & O8.5 V & $-$4.55 & $-$0.31~~~ & 1.27 & 7.47 & 48.64 \\
\hline
\end{tabular}
\end{table}